diff --git a/Mage.Sets/src/mage/cards/c/ChromiumTheMutable.java b/Mage.Sets/src/mage/cards/c/ChromiumTheMutable.java
new file mode 100644
index 00000000000..4ec39507c56
--- /dev/null
+++ b/Mage.Sets/src/mage/cards/c/ChromiumTheMutable.java
@@ -0,0 +1,92 @@
+package mage.cards.c;
+
+import java.util.UUID;
+import mage.MageInt;
+import mage.abilities.Ability;
+import mage.abilities.common.CantBeCounteredAbility;
+import mage.abilities.common.SimpleActivatedAbility;
+import mage.abilities.costs.common.DiscardCardCost;
+import mage.abilities.effects.common.combat.CantBeBlockedSourceEffect;
+import mage.abilities.effects.common.continuous.BecomesCreatureSourceEffect;
+import mage.constants.SubType;
+import mage.constants.SuperType;
+import mage.abilities.keyword.FlashAbility;
+import mage.abilities.keyword.FlyingAbility;
+import mage.abilities.keyword.HexproofAbility;
+import mage.cards.CardImpl;
+import mage.cards.CardSetInfo;
+import mage.constants.CardType;
+import mage.constants.Duration;
+import mage.game.permanent.token.TokenImpl;
+
+/**
+ *
+ * @author TheElk801
+ */
+public final class ChromiumTheMutable extends CardImpl {
+
+    public ChromiumTheMutable(UUID ownerId, CardSetInfo setInfo) {
+        super(ownerId, setInfo, new CardType[]{CardType.CREATURE}, "{4}{W}{U}{B}");
+
+        this.addSuperType(SuperType.LEGENDARY);
+        this.subtype.add(SubType.ELDER);
+        this.subtype.add(SubType.DRAGON);
+        this.power = new MageInt(7);
+        this.toughness = new MageInt(7);
+
+        // Flash
+        this.addAbility(FlashAbility.getInstance());
+
+        // This spell can't be countered.
+        this.addAbility(new CantBeCounteredAbility());
+
+        // Flying
+        this.addAbility(FlyingAbility.getInstance());
+
+        // Discard a card: Until end of turn, Chromium, the Mutable becomes a Human with base power and toughness 1/1, loses all abilities, and gains hexproof. It can't be blocked this turn.
+        Ability ability = new SimpleActivatedAbility(
+                new BecomesCreatureSourceEffect(
+                        new ChromiumTheMutableToken(), null, Duration.EndOfTurn,
+                        false, false, null, null, true
+                ).setText("Until end of turn, {this} becomes "
+                        + "a Human with base power and toughness 1/1, "
+                        + "loses all abilities, and gains hexproof."),
+                new DiscardCardCost()
+        );
+        ability.addEffect(
+                new CantBeBlockedSourceEffect(Duration.EndOfTurn)
+                        .setText("It can't be blocked this turn.")
+        );
+        this.addAbility(ability);
+    }
+
+    public ChromiumTheMutable(final ChromiumTheMutable card) {
+        super(card);
+    }
+
+    @Override
+    public ChromiumTheMutable copy() {
+        return new ChromiumTheMutable(this);
+    }
+}
+
+class ChromiumTheMutableToken extends TokenImpl {
+
+    public ChromiumTheMutableToken() {
+        super("", "Human with base power and toughness 1/1, loses all abilities, and gains hexproof");
+        cardType.add(CardType.CREATURE);
+        subtype.add(SubType.HUMAN);
+        power = new MageInt(1);
+        toughness = new MageInt(1);
+
+        addAbility(HexproofAbility.getInstance());
+    }
+
+    public ChromiumTheMutableToken(final ChromiumTheMutableToken token) {
+        super(token);
+    }
+
+    public ChromiumTheMutableToken copy() {
+        return new ChromiumTheMutableToken(this);
+    }
+}
diff --git a/Mage.Sets/src/mage/sets/CoreSet2019.java b/Mage.Sets/src/mage/sets/CoreSet2019.java
index be39ebd88f1..ce4daf0ec4e 100644
--- a/Mage.Sets/src/mage/sets/CoreSet2019.java
+++ b/Mage.Sets/src/mage/sets/CoreSet2019.java
@@ -53,6 +53,7 @@ public final class CoreSet2019 extends ExpansionSet {
         cards.add(new SetCardInfo("Cavalry Drillmaster", 8, Rarity.COMMON, mage.cards.c.CavalryDrillmaster.class));
         cards.add(new SetCardInfo("Centaur Courser", 171, Rarity.COMMON, mage.cards.c.CentaurCourser.class));
         cards.add(new SetCardInfo("Child of Night", 89, Rarity.COMMON, mage.cards.c.ChildOfNight.class));
+        cards.add(new SetCardInfo("Chromium, the Mutable", 214, Rarity.MYTHIC, mage.cards.c.ChromiumTheMutable.class));
         cards.add(new SetCardInfo("Colossal Dreadmaw", 172, Rarity.COMMON, mage.cards.c.ColossalDreadmaw.class));
         cards.add(new SetCardInfo("Colossal Majesty", 173, Rarity.UNCOMMON, mage.cards.c.ColossalMajesty.class));
         cards.add(new SetCardInfo("Contrite Cleric", 33, Rarity.RARE, mage.cards.c.ContriteCleric.class));
diff --git a/Mage/src/main/java/mage/abilities/effects/common/continuous/BecomesCreatureSourceEffect.java b/Mage/src/main/java/mage/abilities/effects/common/continuous/BecomesCreatureSourceEffect.java
index 63181779803..ba868a521fe 100644
--- a/Mage/src/main/java/mage/abilities/effects/common/continuous/BecomesCreatureSourceEffect.java
+++ b/Mage/src/main/java/mage/abilities/effects/common/continuous/BecomesCreatureSourceEffect.java
@@ -5,7 +5,6 @@ import mage.MageObjectReference;
 import mage.abilities.Ability;
 import mage.abilities.dynamicvalue.DynamicValue;
 import mage.abilities.effects.ContinuousEffectImpl;
-import mage.abilities.keyword.FlyingAbility;
 import mage.constants.*;
 import mage.game.Game;
 import mage.game.permanent.Permanent;
@@ -19,6 +18,7 @@ public class BecomesCreatureSourceEffect extends ContinuousEffectImpl implements
     protected Token token;
     protected String theyAreStillType;
     protected boolean losePreviousTypes;
+    protected boolean loseAbilities;
     protected DynamicValue power = null;
     protected DynamicValue toughness = null;
 
@@ -31,13 +31,16 @@ public class BecomesCreatureSourceEffect extends ContinuousEffectImpl implements
     }
 
     public BecomesCreatureSourceEffect(Token token, String theyAreStillType, Duration duration, boolean losePreviousTypes, boolean characterDefining, DynamicValue power, DynamicValue toughness) {
+        this(token, theyAreStillType,duration,losePreviousTypes,characterDefining,power,toughness,false);
+    }
+    public BecomesCreatureSourceEffect(Token token, String theyAreStillType, Duration duration, boolean losePreviousTypes, boolean characterDefining, DynamicValue power, DynamicValue toughness, boolean loseAbilities) {
         super(duration, Outcome.BecomeCreature);
         this.characterDefining = characterDefining;
         this.token = token;
         this.theyAreStillType = theyAreStillType;
         this.losePreviousTypes = losePreviousTypes;
         this.power = power;
-        this.toughness = toughness;
+        this.toughness = toughness;this.loseAbilities=loseAbilities;
         setText();
 
         this.addDependencyType(DependencyType.BecomeCreature);
@@ -47,7 +50,7 @@ public class BecomesCreatureSourceEffect extends ContinuousEffectImpl implements
         super(effect);
         this.token = effect.token.copy();
         this.theyAreStillType = effect.theyAreStillType;
-        this.losePreviousTypes = effect.losePreviousTypes;
+        this.losePreviousTypes = effect.losePreviousTypes;this.loseAbilities=effect.loseAbilities;
         if (effect.power != null) {
             this.power = effect.power.copy();
         }
@@ -108,6 +111,8 @@ public class BecomesCreatureSourceEffect extends ContinuousEffectImpl implements
 
                 case AbilityAddingRemovingEffects_6:
                     if (sublayer == SubLayer.NA) {
+                        if(loseAbilities){
+                        permanent.removeAllAbilities(source.getSourceId(), game);}
                         for (Ability ability : token.getAbilities()) {
                             permanent.addAbility(ability, source.getSourceId(), game);
                         }